Theory of transient excitonic optical nonlinearities in semiconductor quantum-well structures.
作者： S. Schmitt-Rink , D. S. Chemla , D. A. B. Miller
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摘要: We present theoretical results for the effects of an exciton gas and an electron-hole plasma on the excitonic optical absorption in a two-dimensional semiconductor and compare these with recent experimental results on absorption saturation in single-and multiple-quantum-well structures. A simple theoretical description of the nonlinear optical properties of these microstructures is developed for the case of low-density optical excitation near and above the band edge. We argue that the effects of Coulomb screening of excitons by the plasma …
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